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124 Appendix D Moduli of Various Soils and Aggregates

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TRANSPORTATION RESEARCH BOARD 2008 EXECUTIVE COMMITTEE* Abbreviations used without definitions in TRB publications: OFFICERS AAAE American Association of Airport Executives AASHO American Association of State Highway Officials Chair: Debra L. Miller, Secretary, Kansas DOT, Topeka AASHTO American Association of State Highway and Transportation Officials Vice Chair: Adib K. Kanafani, Cahill Professor of Civil Engineering, University of California, Berkeley ACI–NA Airports Council International–North America Executive Director: Robert E. Skinner, Jr., Transportation Research Board ACRP Airport Cooperative Research Program ADA Americans with Disabilities Act MEMBERS APTA American Public Transportation Association ASCE American Society of Civil Engineers J. BARRY BARKER, Executive Director, Transit Authority of River City, Louisville, KY ASME American Society of Mechanical Engineers ALLEN D. BIEHLER, Secretary, Pennsylvania DOT, Harrisburg ASTM American Society for Testing and Materials JOHN D. BOWE, President, Americas Region, APL Limited, Oakland, CA ATA Air Transport Association ATA American Trucking Associations LARRY L. BROWN, SR., Executive Director, Mississippi DOT, Jackson CTAA Community Transportation Association of America DEBORAH H. BUTLER, Executive Vice President, Planning, and CIO, Norfolk Southern Corporation, Norfolk, VA CTBSSP Commercial Truck and Bus Safety Synthesis Program WILLIAM A.V. CLARK, Professor, Department of Geography, University of California, Los Angeles DHS Department of Homeland Security DAVID S. EKERN, Commissioner, Virginia DOT, Richmond DOE Department of Energy NICHOLAS J. GARBER, Henry L. Kinnier Professor, Department of Civil Engineering, University of Virginia, Charlottesville EPA Environmental Protection Agency FAA Federal Aviation Administration JEFFREY W. HAMIEL, Executive Director, Metropolitan Airports Commission, Minneapolis, MN FHWA Federal Highway Administration EDWARD A. (NED) HELME, President, Center for Clean Air Policy, Washington, DC FMCSA Federal Motor Carrier Safety Administration WILL KEMPTON, Director, California DOT, Sacramento FRA Federal Railroad Administration SUSAN MARTINOVICH, Director, Nevada DOT, Carson City FTA Federal Transit Administration IEEE Institute of Electrical and Electronics Engineers MICHAEL D. MEYER, Professor, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta ISTEA Intermodal Surface Transportation Efficiency Act of 1991 MICHAEL R. MORRIS, Director of Transportation, North Central Texas Council of Governments, Arlington ITE Institute of Transportation Engineers NEIL J. PEDERSEN, Administrator, Maryland State Highway Administration, Baltimore NASA National Aeronautics and Space Administration PETE K. RAHN, Director, Missouri DOT, Jefferson City NASAO National Association of State Aviation Officials SANDRA ROSENBLOOM, Professor of Planning, University of Arizona, Tucson NCFRP National Cooperative Freight Research Program NCHRP National Cooperative Highway Research Program TRACY L. ROSSER, Vice President, Corporate Traffic, Wal-Mart Stores, Inc., Bentonville, AR NHTSA National Highway Traffic Safety Administration ROSA CLAUSELL ROUNTREE, Executive Director, Georgia State Road and Tollway Authority, Atlanta NTSB National Transportation Safety Board HENRY G. (GERRY) SCHWARTZ, JR., Chairman (retired), Jacobs/Sverdrup Civil, Inc., St. Louis, MO SAE Society of Automotive Engineers C. MICHAEL WALTON, Ernest H. Cockrell Centennial Chair in Engineering, University of Texas, Austin SAFETEA-LU Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (2005) LINDA S. WATSON, CEO, LYNX–Central Florida Regional Transportation Authority, Orlando TCRP Transit Cooperative Research Program STEVE WILLIAMS, Chairman and CEO, Maverick Transportation, Inc., Little Rock, AR TEA-21 Transportation Equity Act for the 21st Century (1998) TRB Transportation Research Board EX OFFICIO MEMBERS TSA Transportation Security Administration U.S.DOT United States Department of Transportation THAD ALLEN (Adm., U.S. Coast Guard), Commandant, U.S. Coast Guard, Washington, DC JOSEPH H. BOARDMAN, Federal Railroad Administrator, U.S.DOT REBECCA M. BREWSTER, President and COO, American Transportation Research Institute, Smyrna, GA PAUL R. BRUBAKER, Research and Innovative Technology Administrator, U.S.DOT GEORGE BUGLIARELLO, Chancellor, Polytechnic University of New York, Brooklyn, and Foreign Secretary, National Academy of Engineering, Washington, DC SEAN T. CONNAUGHTON, Maritime Administrator, U.S.DOT LEROY GISHI, Chief, Division of Transportation, Bureau of Indian Affairs, U.S. Department of the Interior, Washington, DC EDWARD R. HAMBERGER, President and CEO, Association of American Railroads, Washington, DC JOHN H. HILL, Federal Motor Carrier Safety Administrator, U.S.DOT JOHN C. HORSLEY, Executive Director, American Association of State Highway and Transportation Officials, Washington, DC CARL T. JOHNSON, Pipeline and Hazardous Materials Safety Administrator, U.S.DOT J. EDWARD JOHNSON, Director, Applied Science Directorate, National Aeronautics and Space Administration, John C. Stennis Space Center, MS WILLIAM W. MILLAR, President, American Public Transportation Association, Washington, DC NICOLE R. NASON, National Highway Traffic Safety Administrator, U.S.DOT JAMES RAY, Acting Administrator, Federal Highway Administration, U.S.DOT JAMES S. SIMPSON, Federal Transit Administrator, U.S.DOT ROBERT A. STURGELL, Acting Administrator, Federal Aviation Administration, U.S.DOT ROBERT L. VAN ANTWERP (Lt. Gen., U.S. Army), Chief of Engineers and Commanding General, U.S. Army Corps of Engineers, Washington, DC *Membership as of May 2008. Need Spine Width